Drill jig



3 Sheets-Sheet 1 INVENTOR.

E. ROSE DRILL JIG Jan. 9, 1951 Filed May 21, 1946 FIG u R E FIG U RE 2 Euse N E ROSE ATTORNEYS Jan. 9,1951 E. ROSE ,537,859

DRILL JIG Filed May 21, 1946 3 Sheets-Sheet 2 FIGURE 3 INVENTOR.

EUGENE ROSE.

A'I'I'D RN EYE Jan. 9, 1951 E. Ros E 37,859

DRILL J IG Filed May 21, 1946 5 Sheets-Sheet 3 FIGURE7.

INVENTOR.

EUGENE v ROS E ATTDRNEYS Patented Jan. 9, 1951 UNITED STATES PATENTOFFICE DRILL J'IG EugeneRose, Clendenin, W. Va.

ApplibationMayZl, 1946, Serial No. 671,239

1 Claim.

The; invention relates to a jig indexing as- 'sembly, and moreespecially to an adjustable indexing assembly fordrilling, punching andmilling: machine production shop work.

The primary object of the invention is the provision' of an; assembly ofthis character, wherein accuracyis assured. through the use thereof whenassociated, with a drill press, punch machine, milling machine, or othershop machinery, without requiring layout methods, in the handling of thework, as now commonly resorted. to, for the: execution. of a. job, theassembly being of novel construction, and. unique in the arrangement ofadjuncts thereof.

Another object of the invention is the provision of an assembly of. thischaracter, wherein it is susceptible of universal adjustment, which is:carried forth. with ease and. dispatch, as well as accuracy in the.finished work, theassembly being compact and involved a minimum numberoi parts parts, thus economical. in repairs and replacements.

A. further object of the invention is the. provision of. an assembly ofthis character, which is simple in construction, thoroughly reliable andeflicient. in operation, strong, durable, susceptible of variousadaptations and adjustments, readily andv easily adjusted, with amaximum range thereto, and inexpensive to manufacture and: install.

With. these and other objects in view the invention consists in. thefeatures of. construction,

combination. and arrangement of parts as will be. hereinafter more.fully described, illustrated in. the accompanying drawings, whichdisclose the preferred embodiment of the invention, and point out in theclaim hereunto appended.

In. the accompanying drawings:

Figurev 1. is a top plan view of the rotary table of. the assembly.

Figure. 2 isa side view, partly broken away, of the assembly constructedin accordance with the invention.

Figure 3. is. a sectional: View taken on the line 3'-3 of Figure 2'looking. inthe; direction of the arrows.

Figure 4 is; a. fragmentary vertical. sectional view. showing a slightmodification of. the rotary table lock. I

Figure 5 is a fragmentary sectional view: taken in. the line 5-5.-. ofFigure 2 looking. in the direction of the arrows.

Figure 6 is a. fragmentary perspectivev view; of the, table plate,showing avarianceinthe index marking thereof from that shown in. Figure1.

Figure Z is an enlarged plan view of a drill guide support.

Figure- 8 is a. sectional view taken on the line 88. of Figure 7.looking in the direction of the arrows.

Figure: 9. is a view similar to Figure 4 showing a further modificationof lock.

Figure 10 is a plan view similar to Figure. 1 showing a modification ofa drill guide support over that. shown in said Figure 1.

Similar reference characters indicate corresponding partsthroughout theseveral. views in the drawings.

Referring to, the drawings in detail, the assembly constituting thepresent invention comprises a vertical columnar or cylindrical tablestand or base. body Ill, which can be of any desirable height, having anexternally flanged bottom rim H. secured: by fasteners 12 in an anchoredpositionuponaa bench or other foundation, a portion being indicated ati3, in Figure 2. The stand or body It at its fiatztop-area l4 has formedcentrally therein; a circular-opening I5, in which is counterseated: thecentral solid hub formation I6 of a rotary turntable ii of fiat disk orcircular contour, which is: of the same or approximate diameter of thearea: M, as appears in Figure 2 of the drawings.

The table ll: in its top face has formed therein criss-crossedirows ofspaced inverted substantially T'-shaped channels or grooves l8 for theadjustable fitting and clamping therein, under selectivity, work;holders, not shown, for a piece of work, also not shown, to hold thework to be operated on, this being a common expedient in drill presses,milling machines or the like.

The hub formation it has: fitted to its under face a disk-like retainingplate l9, which is detachably secured: in place by fasteners 20; tohold: the table rotatably fitted to the stand or body [0-, as will beobvious. The fasteners 20 detachably secure to this plate l9 anunderslung centrally located cylindrical turning post 2|, which isconfined within the said stand or body ill, andahasfittedto itsflangedlower end a. ring wormgear. 22, this being detachably secured, byfasteners 23..

At, aselected point internally of, the stand or body L0,,inproximity tothe gear 22 is an ear 24 i'nwhich is rotatably-fitted an eccentricbearing 25. having a wrist pin 25. The wrist pin 26 providing a pivot:for: the inner end of a, wormthreaded feed. shaft 271 which has itsouter end extended through. a suitable; clearance 29 in the .stand orbody' Ill. The outer-end of the: shaft 21 is revolubly fitted within asleeve bearing 28 which has rocking support in the clearance 29 for theouter end of said shaft, and is devoid of rotation with the latter. Thesleeve bearing 28 at its outer end is provided with an index dial 3!),and the index dial 311 has indexing holes 3| therein spaced from eachother and arranged in concentric rows. On the outer extremity of theshaft 27 and attached thereto for radial adjustment by a screw fastener32 is a setting arm 33, and the arm 33 carries a spring tensionedlatching pin 34. A barrel 35 provides a housing for the pin 34 so that acranking handle is provided, whereby the shaft 21 can be manuallyrotated in order to adjust the table ll so that work can be set thereonin conformity with regulation or adjustment of the latch pin on theindex dial 30.

The eccentric bearing is held in a fixed position in the ear 24 by a setscrew 36, and the set screw 35 is accessible through a slot 31 in thestand or body 10. The purpose of the bearing 25 is to permit regulationof the postition of the shaft 21 and its worm thread 38 relative to thethreads of the ring gear 22, according to the diameter of the ring gear.Thus, the ring gear 22 can be replaced by' other gears conforming withthe adjustment indexing between the table 11 and the dial 30,respectively, so as to insure ccuracy of setting of the work that is tobe operated upon in a drilling machine, punch, milling machine, or thelike.

Centered within the post 2| and table I! is a vertically disposed arbor39, and the arbor 39 adjustably projects above the table I! and issecured thereto by a set screw 40, Figure 5, so that the arbor canrotate with the table.

Formed in the stand or body ID at the external periphery thereof areannular upper and lower guide grooves 4| and Me which adjustably receivetherein fasteners 42 and 42a. The fasteners 42 and 42a serve to connectmounting brackets 43 to the body It. The brackets 43 are provided ontheir upper ends with outturned ends or horizontally disposed heads 44that are of segmental shape. Each of the heads 44 is provided with anarcuately-shaped slot 45. Centrally positioned with respect to the slots45 are dowel pins 46 and 452) which are removably mounted in openings45a and 450 in the upper ends of the brackets 43. A gauge or guide bar47 is provided, and the bar 41 can be set at any horizontal angletraversing the plane of the table H and in parallelism with its topface. To set the guide bar 41, the pin 46 is removed, and the clampingbolt 48 is loosened, and then the bar 41 is moved out of engagement withthe arbor 38, whereby the bar 41 can be pivoted upon the pin 45b. A lookbolt i5 is provided to act as a stop and guide when returning the bar 41to its original position. The bar il is provided with a longitudinallyextending slot 49 which accommodates the arbor 39 when the arborprojects through the slots. An adjustable collar 55 is held in place onthe arbor 39 by a set screw 5|, the collar 50 being arranged below thebar 41, Figure 2, the collar functioning as a central support for thebar when the parts are in the position shown in Figure 1.

The set screw 45 holds the arbor in the hub iii of the table I1, and byloosening the set screw the arbor may be lowered until the upper end isbelow the guide bar 41. With the pin 46 removed, the guide bar may thenbe moved to either side to facilitate positioning and clamping work,such as a gear or other device, on and to the turntable. When the workis bolted or clamped in position,

the guide bar 41 is returned to the position shown in Figure 1, and thearbor is raised until the upper end thereof extends through the slots49. The runner 52 may then be slid along the bar 4'! to position thedrill guide in relation to the work. The bar 4'! can be locked in itsadjusted position by means of a clamping bolt 48 which projects into theslots 45 in the upper end of one of the brackets 43. Seated on the bar41 is an adjustable runner 52. The runner 52 is maintained immobile inits adjusted position on the bar 41 by set screws 53, and the runner 52carries a drill bit or punch guide 54 which is changeable in order toaccommodate various sizes of bits or punches to be used in the assembly.

In Figure 1 of the drawings, the table I! at its outer periphery isprovided with a plurality of index notches 55 which are arranged at 30degree angles with respect to each other, and the notches 55 are adaptedto be selectively engaged by a spring tensioned locking pin 56, the pin56 being carried by the stand or body 10. In this manner, the table I!can be held in a selected position under guidance of the scale markings5! which appear at the margin of the table. Thus, the piece of work canbe quickly located in prope position on the table for drilling, punchingor milling operations with accuracy whenever standard, 30-degree,60-degree and QO-degree separations are required.

In Figures 4 and 9 of the drawings there is shown a slight modification,wherein the table I! is locked in an adjusted position on the stand orbody IQ. This locking means embodies a wedge key 58 which is arrangedwithin the body l0, and the wedge key 58 coacts with an outer peripheralwedging edge 59 of a plate 59a, the plate 59a, being substituted for theretaining plate I3. The key 58 is actuated by an adjusting screw 60which is accessible to a clearance 6|.

In Figure 4 of the drawings there is shown a further modification,wherein the table can be locked in adjusted position by a set screw 62,the set screw 52 being mounted on a bracket 63 and the table and bracketof Figure 4 can be clamped in adjusted position in the stand or body 10by means of the set screw 62.

In Figure 6 of the drawings there is shown another modified arrangement,wherein the table is provided with several index scale markings 64 and65 for the convenience of an operator of the assembly, these markingsbeing a substitute for the scale markings heretofore described.

In Figure 10 of the drawings there is shown a still further modificationwherein the gauge bar involves two sections 66, each of the sections 65being slotted at 67 and the mounting of the sections 56 is identical tothe mounting of the bar 41'. Thus, the sections 65 can be adjustedtoward and away from each other in accordance with the layout of thework to be operated upon by a machine with which the assembly may beassociated.

It should be seen that the work on the table I! can be rotated withindefinite limits under the adjustment setting or indexing of the assemblyso that this work can be drilled, punched or milled with accuracy inassociation of this assembly with such types of machines.

What is claimed is:

In a drill jig, a vertically disposed base body provided with a bottomrim adapted to be secured to a supporting body, a turntable rotatablysupported by said base body, there being a pair of spaced parallelhorizontally disposed annular guide grooves arranged in the exteriorsurface of said base body, a pair of vertically disposed bracketsarranged contiguous to the outer surface of said base body, horizontallydisposed fastening elements projecting through said brackets andslidably engaging said guide grooves, the upper end of each of saidbrackets being shaped to define a horizontally disposed head, therebeing an arcuate slot arranged in each of said heads, there being anopening in each of said heads, a guide bar extending between said headsand supported by the latter, a pair of dowel pins projecting throughsaid guide bar and having their lower ends engaging the openings in saidheads, a securing element projecting through one end of said guide barand into the arcuate slot in one of said heads for maintaining the guidebar immobile in its adjusted position, a runner adjustably mounted forlongitudinal movement along said guide bar, and securing elementsprojecting through said runner and into engagement with said guide barfor maintaining said runner immobile in its adjusted position.

EUGENE ROSE.

REFERENCES CITED The following references are of record in the file ofthis patent:

Number Number 6 UNITED STATES PATENTS Name Date Bustin Mar. 28, 1876Lipe Feb. 5, 1884 Libby Dec. 26, 1893 Grohmann Oct. 18, 1898 Hanton Feb.19, 1918 Drescher Dec. 1, 1931 Buhr Feb. 13, 1934 Betz Feb. 4, 1936Weightman Feb. 11, 1936 Favre Oct. 13, 1936 McCurdy Dec. 30, 1941 GortonFeb. 22, 1944 Walling June '13, 1944 Becker Feb. 13, 1945 Gardiner Nov.6, 1945 Beitz Jan. 7, 1947 FOREIGN PATENTS Country Date Great BritainAug. 27, 1908 Great Britain 1934

